Piston ring squeezer



Sept, i, w31. E. c. NEWTQN PISTON RING SQUEEZER Original Filed A ug. 10, 1927 Patented Sept. 1, 1931 unirse srares sereni cgi-FICE EDW'ARD V(L. NEWTON, OF LCS ANGELES, CATFORDIIQASSIGNOR TO E. NEWTON `BRKATL, CQRPGRATION OF CALIFORNIA rrs'rou nine saoudienn- Applcation tile-c. August 1G, 1532*?, Serial. No. 211,863. Renewed February 18, 1.931.

s invention relates to a manually operl .veel for contracting piston rings pre- ],iaratorv to the act `ot inserting into fits'cylinder a iiston upon which the piston rings l l are mounted.

An object of the invention is to provide an exceedingly simple tool of this character which will engage and simultaneously contract all the rings mounted on a piston so lo that the latter can, without diHicu-lty be nserted into its cylinder.

A further object is to so construct the device that it can advantageously be used to contract the rings upon a piston and then 15 insert the piston into its cylinder with equal facility whether it is necessary to move the piston upwardly, downwardly or in some direction at the moment of its insertion into the cylinder. i

Referring to the accompanying drawings, which illustrate a preferred embodiment ot the invention:

Fig. 1 a plan View ot' the tool illustrating in full lines the ring'engaging portion in expanded position and depicting in dot-ted llines the ring engaging portion in a contracted position;

Fig. 2 is a detail in longitudinal section and elevation as seen on the line 2-2 of Fig. l;

Fig. 3 is an enlarged cross section on linel 8-3 of Fig. 1;

Fig. l. is an end view ot the traction means, a portion. ot the flexible connection being broken away to contract the view;

Fig, 5 is a view illustrating the tool being used to contract the rings of a piston and positioned Ior insertion into a piston cyl? inder which opens downwardly;

Fig. 6 is a view illustrating the tool as positioned for insertion of the piston and rings into a piston cylinder whi-ch opens upwardly.

Referring in detail to the drawings, 7 designates a resilient sleeve of spiral form having overlapping disconnected ends; 8 indicating its outer end and 9 its inner end. A flexible band 10 embraces said sleeve circumferentially, a portion 11 of said band extending into a tubular shank 12 through openings 13-with which one end of said shanlr is provided, which end of the shank is latt-ened at 14 as shown. Within said shank 12 is a screw threaded rod 15 rhaving a hook 16 at one end with which the p0rtion 11 of the band 10 is engaged in-order that by retraction of said rod, the band 10 may be tightened upon the sleeve 7 to contract the latter.

The rod is provided with a pin 17 which extends into and slidably engages a longitudinal slot 18 with which the tubular shank 12.is provided, whereby the rod and shank 'are held againstY relative rotation. The rod 13 projects at all times from the outer end of said .shank and its projecting portion has a screw threaded engagement with a turnable manually operable actuating nut 19, which is adapted to abut against the outer end of the shank.

In the operation of the invention the sleeve 7 is positioned around a piston 20 to encompass the piston rings on the latter, whereupon the nut 19 is manipulated to effect retraction of the rod 13; rotation of the nut 19 in one direction causing the latterto advance on the threaded portion of the rod A13 with the vnut bearing against the outer end of the shank 12. This retraction of the rod 13 exerts a pull on the band 10 causing the latter to contract the sleeve 7. In this manner the sleeve may be caused to engage the piston rings on the piston and operate to contractthe rings so that the outer peripheries of the latter will extend flush with the circumferential surface of the piston when the sleeve 7 is contracted substantially to contact the cylindrical surface of the piston. In thus positioning the sleeve 7 on the piston, the end portion of the latter is eX- posed to admit of its readily being inserted inthe engine cylinder. On inserting the eX- posed en d portion of the piston being. inl serted within thel cylinder with the end of the sleeve abutting against the end of the cylinder' the piston is driven, as by a mallet, into the cylinder, together Vwith its rings; the piston slidingthrough the sleeve during Vthis operation. The piston rings being 'contracted by the sleeve 7 will thus be ted into the cylinder with the piston.

Afterl the piston has been advanced into the cylinder such distance asto dispose tlv rings within the cylinder the nut l5) is tracted on the stein 13 so as to allow the sleeve 7 to expand whereupon the latter may be freely withdrawn from the piston.

The sleeve 7 is termed o'f thin rv ilient metal such as spring steel and is normally of such diameter' to be adapted to be applied to large sized pistons, but by reason of its lexibility adapted to be contracted to such extent as to be adapted to be applied 15 to pistons ot' comparatively small size,

indicated by way of comparison in Fig: i. This gives the tool a wide range ot use,

The end portion la' ot the shank is flared as are the walls ot' tie openin'f" so that the portions ofthe bi 1 therethrough may be readily tl u s as to obviate kinking of the band. The band being flexible permits the shank being swun to extend at an angle either upwardly or downwardlyrelatively to the sleeve so as to facilitate disposing the piston Vengaged by the sleeve in position to enter the upper end of a cylinder as shown in Fig. 5 or be in-v serted in the lower end ot' the cylinder as shown Yin Fig. 6, Y

It is understood that the invention is not limited to the speciic embodiment thereof illustrated in the drawings, but that changes 'm of construction may be made by those skilled in the art without necessarily departing from the spirit of the invention as defined by the claims.

Iclaini: Y Y

l. In a device of the character described, a contractable sleeve, a flexible band to embrace said sleeve, amember having an opening through which said band is led, and means to draw a portion of said band through said opening to contract said sleeve.

2. In a device et the character described, a contractable sleeve, a iiexible band extending therearound, a member having an opening through which said band is led, a part ,vto which said band is fastened, said part being movable with relation to said member to a retracted position to tighten said band upon said sleeve, and` means to retain said part in a retracted position.

vri- .Le

a contractable sleeve, a iexible band extending therearound, a member having anopening through which said band is led, a part towhich said band is fastened, said part ff, being provided with screw threads, and a rotatableeiementhaving screw threads engaging the screw threads orY said part to move said part with relation to said member andthereby tighten'said band upon said sleeve.

4. In a device ot the character described,

3. In a device ot the-character described,

a resilient sleeve having disconnected ends, a flexible band, and means comprising a hook operable at any angle to said band and adapted to be hooked to the band so as to tighten said band upon said sleeve to contract the latter and to relax. said connection to permit said sleeve to expand itself.

5. In a device of the character described, a resilient sleeve having disconnected ends, a iiexible band embracing said sleeve, a tubular member into which a portion of said band extends, a non-rotatable part within said member, said band being fastened to said part, and a rotatable element having a screw threaded engagement with said part 30 to retract the latter in order to tighten said band upon said sleeve.

In testimony whereof, I have affixed my signature.

EDl/VARD C. NElVT ON. 

